From: A one-year exercise intervention program in pre-pubertal girls does not influence hip structure
 | Baseline | Annual changes | P-value | P-value | |||
---|---|---|---|---|---|---|---|
 | Intervention | Control | p-value | Intervention | Control | unadjusted | adjusted |
Age (years) | 7.7 ± 0.6 | 7.9 ± 0.6 | 0.08 |  |  |  |  |
Anthropometry | |||||||
Weight (kg) | 27.6 ± 5.5 | 27.4 ± 5.5 | 0.84 | 3.5 ± 2.2 | 3.2 ± 1.3 | 0.42 |  |
Height (cm) | 128 ± 5.2 | 129.1 ± 7.9 | 0.43 | 6 ± 1.2 | 5.7 ± 1.0 | 0.19 |  |
Lean mass (kg) | 19.8 ± 2.3 | 20.2 ± 2.8 | 0.42 | 2.2 ± 0.8 | 1.9 ± 0.6 | 0.01 |  |
Fat mass (kg) | 5.3 ± 3.9 | 5.2 ± 3.3 | 0.86 | 1.9 ± 1.5 | 1 ± 0.9 | < 0.001 |  |
Bone mass of femoral neck | |||||||
Bone mineral content (BMC; g) | 2.63 ± 0.563 | 2.54 ± 0.497 | 0.39 | 0.266 ± 0.554 | 0.252 ± 0.236 | 0.87 | 0.86 |
Bone mineral density (BMD; g/cm2) | 0.743 ± 0.089 | 0.701 ± 0.090 | 0.04 | 0.038 ± 0.071 | 0.045 ± 0.042 | 0.61 | 0.86 |
Volumetric bone mineral density (vBMD; g/cm3) | 0.377 ± 0.044 | 0.359 ± 0.047 | 0.07 | 0.010 ± 0.037 | 0.012 ± 0.024 | 0.81 | 0.55 |
Biomechanical calculations of femoral neck | |||||||
Neck length (cm) | 3.18 ± 0.401 | 3.25 ± 0.356 | 0.41 | 0.209 ± 0.348 | 0.237 ± 0.129 | 0.63 | 0.73 |
Periosteal width (cm) | 2.46 ± 0.234 | 2.46 ± 0.225 | 0.89 | 0.086 ± 0.247 | 0.067 ± 0.113 | 0.64 | 0.68 |
Cross sectional area (CSA; cm2) | 0.947 ± 0.156 | 0.889 ± 0.152 | 0.11 | 0.084 ± 0.180 | 0.091 ± 0.078 | 0.82 | 0.67 |
Section modulus (Z; cm3) | 0.298 ± 0.090 | 0.272 ± 0.082 | 0.16 | 0.044 ± 0.088 | 0.049 ± 0.042 | 0.73 | 0.67 |
Cross-sectional moment of inertia (CSMI; cm4) | 0.374 ± 0.159 | 0.338 ± 0.130 | 0.25 | 0.069 ± 0.167 | 0.074 ± 0.067 | 0.86 | 0.81 |
Endosteal width (cm) | 2.30 ± 0.228 | 2.32 ± 0.224 | 0.74 | 0.078 ± 0.240 | 0.057 ± 0.114 | 0.59 | 0.62 |
Mean cortical thickness (cm) | 0.076 ± 0.009 | 0.071 ± 0.009 | 0.02 | 0.004 ± 0.008 | 0.005 ± 0.005 | 0.44 | 0.97 |